JPH02202707A - Temperature compensating the voltage controlled piezoelectric oscillator - Google Patents
Temperature compensating the voltage controlled piezoelectric oscillatorInfo
- Publication number
- JPH02202707A JPH02202707A JP2085589A JP2085589A JPH02202707A JP H02202707 A JPH02202707 A JP H02202707A JP 2085589 A JP2085589 A JP 2085589A JP 2085589 A JP2085589 A JP 2085589A JP H02202707 A JPH02202707 A JP H02202707A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- temperature
- output
- piezoelectric oscillator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 abstract description 19
- 238000010586 diagram Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 1
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- Oscillators With Electromechanical Resonators (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、温度補償手段を設けた温度補償型電圧制御圧
電発振器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a temperature compensated voltage controlled piezoelectric oscillator provided with temperature compensation means.
従来、この種の温度補償型電圧制御圧電発振器は、第５
図に示すように圧電振動子１と、増幅素子２と、２個の
位相反転コンデンサ３，４と、可変容量ダイオード５と
、直流カット用コンデンサ６と、抵抗器７，８とによっ
てコルピッツ型電圧制御圧電発振回路を構成し、前記可
変容量ダイオード５のアノード側に周波数制御入力電圧
Ｖ、を接続し、さらに抵抗器１６と定電圧ダイオード１
Ｔとで得られる基準電圧を抵抗器１８と、ダイオード２
０と抵抗器１９との直列回路とで分圧するように接続し
た温度補償回路の出力を可変容量ダイオード５のカソー
ド側に供給する構成となっていた。なお、可変容量ダイ
オード５のカソード側には７ノード側よシ高い電圧が供
給されている。Conventionally, this type of temperature-compensated voltage-controlled piezoelectric oscillator has a fifth
As shown in the figure, a Colpitts type voltage is generated by a piezoelectric vibrator 1, an amplification element 2, two phase inverting capacitors 3, 4, a variable capacitance diode 5, a DC cut capacitor 6, and resistors 7, 8. A controlled piezoelectric oscillator circuit is configured, in which a frequency control input voltage V is connected to the anode side of the variable capacitance diode 5, and a resistor 16 and a constant voltage diode 1 are connected.
The reference voltage obtained from T is connected to resistor 18 and diode 2.
The configuration was such that the output of a temperature compensation circuit connected to a series circuit of 0 and a resistor 19 to divide the voltage was supplied to the cathode side of the variable capacitance diode 5. Note that a higher voltage is supplied to the cathode side of the variable capacitance diode 5 than to the 7th node side.
第６図、第７図は、従来の温度補償型電圧制御圧電発振
器における発振周波数の温度補償の動作を説明する図で
あシ、第７図は前記温度補償回路から出力される電圧の
温度特性例である。いま、入力端子に一定の周波数制御
電圧ｖＸが印加されている状態において、周囲温度がＴ
１からＴ２まで高くなったとすると、前記電圧制御圧電
発振回路の発振周波数が第６図（イ）の如く、Ｆｌから
Ｆｌへ下がるが、このとき、温度補償回路の出力がダイ
オード２０（第５図参照）の正の順方向電圧温度特性に
よってｖｌからｖ２まで高く（第７図参照）なる結果、
前記電圧制御圧電発振器の発振周波数は第６図（ロ）の
如く、Ｆ、からｐ ２／へ変化し、Ｆ２−１ｉ”２だけ
温度補償されたことになる。なお、温度補償回路ｏｎ囲
温度変化による出力の変化量は、抵抗器１８．１９の値
によって変化させることができ、また、温度補償回路の
出力変化による周波数変化量は、可変容量ダイオード５
（第５図参照）の両端電圧変化に対する容量変化感度お
よび可変容量ダイオード５（第５図参照）の容量変化に
対する前記電圧制御圧電発振回路の周波数変化感度によ
って決定される。6 and 7 are diagrams explaining the operation of temperature compensation of the oscillation frequency in a conventional temperature compensated voltage controlled piezoelectric oscillator, and FIG. 7 shows the temperature characteristics of the voltage output from the temperature compensation circuit. This is an example. Now, with a constant frequency control voltage vX being applied to the input terminal, the ambient temperature is T.
1 to T2, the oscillation frequency of the voltage-controlled piezoelectric oscillator circuit decreases from Fl to Fl as shown in FIG. As a result, the voltage increases from vl to v2 (see Fig. 7) due to the positive forward voltage temperature characteristic of
The oscillation frequency of the voltage-controlled piezoelectric oscillator changes from F to p2/ as shown in FIG. The amount of change in the output due to the change can be changed by the values of the resistors 18 and 19, and the amount of frequency change due to the change in the output of the temperature compensation circuit can be changed by the value of the variable capacitance diode 5.
(see FIG. 5) and the frequency change sensitivity of the voltage-controlled piezoelectric oscillator circuit to capacitance changes of the variable capacitance diode 5 (see FIG. 5).
上述した従来の温度補償型電圧制御圧電発振器は、圧電
振動子の温度特性のばらつきゃ可変容量ダイオードの温
度特性のばらつきによって発振周波数の温度特性が変化
するので、温度補償回路の補償特性も可変にする必要が
あったが、温度補償回路の補償特性を変化させると、発
振周波数の初期値をも変化させてしまうため、温度補償
回路の補償特性を可変にすることが困難となシ、その結
果、温度補償型電圧制御圧電発振器の温度特性を悪化さ
せていた。In the conventional temperature-compensated voltage-controlled piezoelectric oscillator described above, the temperature characteristics of the oscillation frequency change due to variations in the temperature characteristics of the piezoelectric vibrator and the temperature characteristics of the variable capacitance diode, so the compensation characteristics of the temperature compensation circuit can also be varied. However, changing the compensation characteristics of the temperature compensation circuit also changes the initial value of the oscillation frequency, which makes it difficult to make the compensation characteristics of the temperature compensation circuit variable. , which deteriorated the temperature characteristics of the temperature-compensated voltage-controlled piezoelectric oscillator.
本発明の温度補償型電圧制御圧電発振器は、前述した従
来の課題を解決するためになされたものであシ、圧電振
動子と、増幅素子と、２個の位相反転用コンデンサと、
可変容量素子と、直流カット用コンデンサと、抵抗器か
ら成石コルピッツ型電圧制御圧電発振器において、前記
可変容量素子の一端に周波数制御入力を接続し、他の一
端に温度補償回路を接続した構成を有し、温度補償回路
として温度検出回路の出力を利得可変の第１の差動増幅
器の入力の一方に、入力の他の一方に基準電圧回路の一
方の出力を各々接続し、前記第１の差動増幅器出力を第
２の差動増幅器の入力の一方に１前記第２の差動増幅器
の入力の他の一方を電圧可変回路の出力に各々接続し、
さらに前記基準電圧回路の出力の他の一方を電圧可変回
路の入力に接続する構成を有している。The temperature compensated voltage controlled piezoelectric oscillator of the present invention was made to solve the above-mentioned conventional problems, and includes a piezoelectric vibrator, an amplification element, two phase inversion capacitors,
A Narishi Colpitts type voltage-controlled piezoelectric oscillator is made of a variable capacitance element, a DC cut capacitor, and a resistor, and a frequency control input is connected to one end of the variable capacitance element, and a temperature compensation circuit is connected to the other end. The output of the temperature detection circuit as a temperature compensation circuit is connected to one of the inputs of the first differential amplifier with variable gain, and one output of the reference voltage circuit is connected to the other input of the first differential amplifier. a differential amplifier output is connected to one input of a second differential amplifier, and the other one of the inputs of the second differential amplifier is connected to an output of a voltage variable circuit, respectively;
Further, the other output of the reference voltage circuit is connected to the input of the voltage variable circuit.
本発明においては、第１の差動増幅器の利得を可変する
ことにょシ、周囲温度の変化は対する温度補償回路の出
力変化比を任意に設定できるので、発振周波数の温度特
性が変化しても温度補償回路の補償特性を可変して補償
することに々る。In the present invention, in addition to varying the gain of the first differential amplifier, the output change ratio of the temperature compensation circuit can be set arbitrarily in response to changes in ambient temperature, so even if the temperature characteristics of the oscillation frequency change. Compensation is often achieved by varying the compensation characteristics of the temperature compensation circuit.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図〜第４図は本発明の温度補償型電圧制御発振器の
一実施例を説明する′図で、第１図は温度補償型電圧制
御圧電発振器回路図、第２図は温度補償回路の回路ブロ
ック図、第３図は発振周波数温度特性図、第４図は温度
補償回路出力の温度特性図である。第１図中、第５図と
同一構成要素には同一符号を付しである。1 to 4 are diagrams illustrating an embodiment of the temperature-compensated voltage-controlled oscillator of the present invention. FIG. 1 is a circuit diagram of the temperature-compensated voltage-controlled piezoelectric oscillator, and FIG. A circuit block diagram, FIG. 3 is an oscillation frequency temperature characteristic diagram, and FIG. 4 is a temperature compensation circuit output temperature characteristic diagram. In FIG. 1, the same components as in FIG. 5 are given the same reference numerals.
第１図に訃いて、コルピッツ壓電圧制御圧電発振回路を
構成している可変容量ダイオード５のアノード側に周波
数制御入力が、カソード側には温度補償回路１０の出力
がそれぞれ接続され、ダイオード５０カンード側には７
ノード側電圧よシ高い電圧が供給されているため、温度
補償回路１゜の出力が高くなると、前記電圧制御圧電発
振回路の発振周波数が高くなシ、温度補償回路５の出力
が低くなると、前記電圧制御圧電発振回路の発振周波数
も低くなる。９２図において、温度検出回路１１の出力
は周囲温度の変化に対応した電圧を出力しておシ、その
電圧が第Ｉの差動増幅器１２の一方の入力に供給されて
いる。一方、第１の差動増幅器１２の他の入力には基準
電圧回路１４の出力の一つが接続されておυ、安定な電
圧を供給している。したがって、ｇｉの差動増幅器１２
の出力には、温度検出回路１１の出力変化に対応した電
圧が出力されることになυ、また、第１の差動増幅器１
２は利得可変盤のため、温度検出回路１１の出力変化に
対する第１の差動増幅器１２の出力変化比は任意に設定
される。さらに第１の差動増幅器１２の出力は第２の差
動増幅器１３の一方の入力に接続され、他の入力には基
準電圧回路１４の他の出力から供給を受けた電圧を任意
の電圧で出力する電圧可変回路１５の出力が接続されて
いるので、第２の差動増幅器１３の出力には、電圧可変
回路１５の出力電圧によって決定される電圧値を中心と
し、周囲温度の変化にある一定の比で対応する電圧を出
力する。以下、周囲温度変化に対する温度補償回路出力
の変化および電圧制御圧電発振回路の発振周波数の変化
に関する動作は、従来の技術で説明した動作と同様であ
るので省略する。As shown in FIG. 1, a frequency control input is connected to the anode side of a variable capacitance diode 5 constituting a Colpitts voltage controlled piezoelectric oscillator circuit, and the output of a temperature compensation circuit 10 is connected to the cathode side. 7 on the side
Since a voltage higher than the node side voltage is supplied, when the output of the temperature compensation circuit 1 increases, the oscillation frequency of the voltage controlled piezoelectric oscillation circuit increases, and when the output of the temperature compensation circuit 5 decreases, the oscillation frequency increases. The oscillation frequency of the voltage-controlled piezoelectric oscillator circuit also becomes lower. In FIG. 92, the temperature detection circuit 11 outputs a voltage corresponding to the change in ambient temperature, and this voltage is supplied to one input of the I-th differential amplifier 12. On the other hand, one of the outputs of the reference voltage circuit 14 is connected to the other input of the first differential amplifier 12 to supply a stable voltage. Therefore, the differential amplifier 12 of gi
A voltage corresponding to the change in the output of the temperature detection circuit 11 is outputted to the output of the first differential amplifier 1.
Since 2 is a variable gain board, the ratio of change in the output of the first differential amplifier 12 to the change in the output of the temperature detection circuit 11 can be arbitrarily set. Furthermore, the output of the first differential amplifier 12 is connected to one input of the second differential amplifier 13, and the other input is supplied with an arbitrary voltage from the other output of the reference voltage circuit 14. Since the output of the variable voltage circuit 15 is connected, the output of the second differential amplifier 13 has a voltage value determined by the output voltage of the variable voltage circuit 15 as the center, and the voltage value is determined by the output voltage of the variable voltage circuit 15 as the ambient temperature changes. Output the corresponding voltage at a constant ratio. Hereinafter, operations related to changes in the output of the temperature compensation circuit and changes in the oscillation frequency of the voltage-controlled piezoelectric oscillation circuit with respect to changes in ambient temperature are the same as those described in the related art, and will therefore be omitted.
以上説明したように本発明は、周囲温度の変化に対する
温度補償回路の出力変化比を、第１の差動増幅器の利得
を可変することＫよ少、任意に設定できるので、圧電振
動子の温度特性のばらつきや可変容量ダイオードの温度
Ｉｒｉ性のばらつきＫよって発振周波数の温度特性が変
化しても、温度補償回路の補償特性を可変して補償する
ことができ、また、補償特性を変化させることによって
生じる発振周波数の初期値の変化を、電圧可変回路から
第２の差動増幅器へ供給する電圧の調整によってなくす
ことができる。また、温度補償回路や基準電圧回路や電
圧可使回路および差動増幅器はＬＳＩ化することが可能
である。したがって小製で温度特性の曳い温度補償型電
圧制御圧電発振器を実現することができる効果がある。As explained above, the present invention allows the output change ratio of the temperature compensation circuit with respect to changes in the ambient temperature to be set arbitrarily by changing the gain of the first differential amplifier. Even if the temperature characteristics of the oscillation frequency change due to variations in characteristics or variations in temperature Iri of the variable capacitance diode, it can be compensated for by varying the compensation characteristics of the temperature compensation circuit, and it is also possible to change the compensation characteristics. The change in the initial value of the oscillation frequency caused by this can be eliminated by adjusting the voltage supplied from the voltage variable circuit to the second differential amplifier. Further, the temperature compensation circuit, the reference voltage circuit, the voltage available circuit, and the differential amplifier can be implemented as an LSI. Therefore, it is possible to realize a small-sized temperature-compensated voltage-controlled piezoelectric oscillator with good temperature characteristics.
第１図は本発明の一実施例を示す温度補償型電圧制御圧
電発振器の回路構成図、第２図は第１図における温度補
償回路の構成を示す回路ブロック図、第３図は第１図の
電圧制御圧電発振回路の周波数温度特性例を示す図、Ｉ
＠４図は第１図の温度補償回路出力の温度特性例を示す
図、１ｇ５図は従来の温度補償型電圧制御圧電発振器の
回路構成図、第６図は第５図の電圧制御圧電発振回路の
周波数温度特性例を示す図、第７図は第６図の温度補償
回路出力の温度特性例を示す図である。
１・一番−圧電振動子、２争・・・増＠素子、３．４・
会・の位相反転用コンデンサ、５・・拳−可変容量ダイ
オード、６・・壷嗜直流カット用コンデンサ、７，８，
９Φ・・働抵抗器、１０・温度補償回路、１１・・◆・
温度検出回路、１２゜１３・・・Φ差動増幅器、１４・
・・拳基準電圧回路、１５番・番−電圧可変回路、ｉ６
．ＩＣｌ３曇・番・抵抗器、２０・＠−・ダイオード〇
第１図FIG. 1 is a circuit configuration diagram of a temperature compensated voltage controlled piezoelectric oscillator showing an embodiment of the present invention, FIG. 2 is a circuit block diagram showing the configuration of the temperature compensation circuit in FIG. 1, and FIG. A diagram showing an example of frequency-temperature characteristics of a voltage-controlled piezoelectric oscillator circuit, I
@Figure 4 is a diagram showing an example of the temperature characteristics of the output of the temperature compensation circuit in Figure 1, Figure 1g5 is a circuit configuration diagram of a conventional temperature-compensated voltage-controlled piezoelectric oscillator, and Figure 6 is the voltage-controlled piezoelectric oscillator circuit in Figure 5. FIG. 7 is a diagram showing an example of the temperature characteristic of the output of the temperature compensation circuit of FIG. 6. 1. Ichiban-piezoelectric vibrator, 2nd place... Increase @ element, 3.4.
Phase inversion capacitor, 5. Fist-variable capacitance diode, 6. Capacitor for direct current cut, 7, 8.
9Φ・Working resistor, 10・Temperature compensation circuit, 11・・◆・
Temperature detection circuit, 12゜13...Φ differential amplifier, 14.
・・Fist reference voltage circuit, No. 15 - Voltage variable circuit, i6
．． ICl3 cloudy resistor, 20 @- diode 〇Figure 1
Claims (1)
量素子、直流カット用コンデンサおよび抵抗器からなる
コルピツツ型電圧制御圧電発振器と、前記可変容量素子
の周波数制御入力電圧が接続される他端側に接続された
温度補償回路とを備えたことを特徴とする温度補償型電
圧制御圧電発振器。A Colpitts-type voltage-controlled piezoelectric oscillator consisting of a piezoelectric vibrator, an amplification element, a phase inversion capacitor, a variable capacitance element, a DC cut capacitor, and a resistor, and the other end to which the frequency control input voltage of the variable capacitance element is connected. A temperature-compensated voltage-controlled piezoelectric oscillator, comprising a temperature-compensated circuit connected thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2085589A JPH02202707A (en) | 1989-02-01 | 1989-02-01 | Temperature compensating the voltage controlled piezoelectric oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2085589A JPH02202707A (en) | 1989-02-01 | 1989-02-01 | Temperature compensating the voltage controlled piezoelectric oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02202707A true JPH02202707A (en) | 1990-08-10 |
Family
ID=12038718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2085589A Pending JPH02202707A (en) | 1989-02-01 | 1989-02-01 | Temperature compensating the voltage controlled piezoelectric oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02202707A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001127549A (en) * | 1999-10-29 | 2001-05-11 | Matsushita Electric Ind Co Ltd | Temperature-compensated crystal oscillator |
-
1989
- 1989-02-01 JP JP2085589A patent/JPH02202707A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001127549A (en) * | 1999-10-29 | 2001-05-11 | Matsushita Electric Ind Co Ltd | Temperature-compensated crystal oscillator |
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